Demand – The desire, ability, and willingness to buy a good or service.
Microeconomics – The study of individual consumers and businesses in an economy.
Demand Schedule – A table showing the quantity of a good consumers are willing to buy at different prices.
Demand Curve – A graphical representation of the demand schedule, showing the inverse relationship between price and quantity demanded.
Law of Demand – As the price of a good increases, the quantity demanded decreases, and vice versa.
Market Demand Curve – A demand curve that shows the total quantity demanded by all consumers at various prices.
Marginal Utility – The additional satisfaction gained from consuming one more unit of a good.
Diminishing Marginal Utility – The principle that as more of a good is consumed, the additional satisfaction gained decreases.
Change in Quantity Demanded – A movement along the demand curve due to a change in price.
Income Effect – When a price drop increases consumers' purchasing power, leading them to buy more.
Substitution Effect – When a price increase causes consumers to replace a good with a cheaper alternative.
Change in Demand – When factors other than price (like income or preferences) shift the entire demand curve.
Consumer Income – The amount of money consumers earn, affecting their purchasing power.
Consumer Tastes – Preferences and trends that influence how much of a good people buy.
Substitutes – Goods that can replace each other (e.g., Coke and Pepsi).
Complements – Goods that are used together (e.g., peanut butter and jelly).
Consumer Expectations – What consumers anticipate about future prices, income, or product availability, affecting demand.
Number of Consumers – The total number of buyers in a market, influencing demand levels.
Elasticity – A measure of how much quantity demanded changes in response to a price change.
Elastic Demand – Demand that changes significantly with a small price change (luxuries, non-essentials).
Inelastic Demand – Demand that changes little with a price change (necessities, few substitutes).
Unit Elastic Demand – A situation where a price change leads to a proportional change in quantity demanded.
Total Expenditures Test – A method to determine elasticity by multiplying price and quantity demanded (if total revenue moves in the opposite direction of price, demand is elastic).